GB740811A - Improvements in the heat-sealing of thermoplastic film - Google Patents
Improvements in the heat-sealing of thermoplastic filmInfo
- Publication number
- GB740811A GB740811A GB20341/52A GB2034152A GB740811A GB 740811 A GB740811 A GB 740811A GB 20341/52 A GB20341/52 A GB 20341/52A GB 2034152 A GB2034152 A GB 2034152A GB 740811 A GB740811 A GB 740811A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- sealing
- strip
- heat
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/60—Uniting opposed surfaces or edges; Taping
- B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2160/00—Shape of flexible containers
- B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
Landscapes
- Laminated Bodies (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
740,811. Seaming non-metallic sheet material. IMPERIAL CHEMICAL INDUSTRIES, Ltd. Aug. 12, 1953 [Aug. 13, 1952], No. 20341/52. Class 42 (1). [Also in Group XVII] In a process for forming transverse seams between two or more continuous, superimposed layers of thermoplastic film by passing them from a feed roller or rollers over a supporting plate or drum to a take-off roller or the like and bringing a heated seaming member, protected by a separating barrier, into contact with the film above the plate or drum and holding it there until the layers are seamed together across their width, at least one securing member is brought into contact with the film close to the seaming region, and on each side thereof, before the heat-sealing member is withdrawn from contact with the film, and is withdrawn from contact with the film after the heat-sealing member has been withdrawn, the seaming member or members being at a temperature below the heat-sealing temperature of the film. As shown, flattened tubular film 1 passes from a feed roller 2 to take-off rollers 3 over a supporting metal plate 4 surfaced with resilient silicone rubber 7. The feed of the film is interrupted at set intervals, and an electricallyheated metal sealing strip 5 and a securing member 6 are brought down simultaneously, under spring loading, to press the film against plate 4. The edge of strip 5 is coated with polytetrafluorethylene to form a separating barrier. Member 6 extends on each side of strip 5 across the width of the film and is preferably water-cooled. When a heat-seal has been formed, strip 5 and member 6 are raised successively and the film advanced for the next seal. In an alternative arrangement, plate 4 is replaced by a continuously revolving drum, surfaced with silicone rubber, around a part of whose circumference the film passes. The sealing and securing members are adapted to press the film on to the drum surface, to travel for a short distance with the drum to seal the film, to be raised in succession and to be returned to their initial positions for the next sealing cycle. For sealing polythene film, a sealing-strip temperature of 180‹ C. is used and the sealing and securirig members contact the film for 0.5 and 0.8 seconds respectively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB20341/52A GB740811A (en) | 1952-08-13 | 1952-08-13 | Improvements in the heat-sealing of thermoplastic film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB20341/52A GB740811A (en) | 1952-08-13 | 1952-08-13 | Improvements in the heat-sealing of thermoplastic film |
Publications (1)
Publication Number | Publication Date |
---|---|
GB740811A true GB740811A (en) | 1955-11-23 |
Family
ID=10144345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20341/52A Expired GB740811A (en) | 1952-08-13 | 1952-08-13 | Improvements in the heat-sealing of thermoplastic film |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB740811A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3153608A (en) * | 1961-10-06 | 1964-10-20 | Edwin E Messmer | Machine for heat-treating superposed plies of plastic material |
US3272674A (en) * | 1962-05-28 | 1966-09-13 | Union Carbide Corp | Plastic film welding process and apparatus |
US3334004A (en) * | 1964-02-25 | 1967-08-01 | Union Carbide Corp | Apparatus for cutting and radiant heat sealing thermoplastics |
FR2629755A1 (en) * | 1988-04-11 | 1989-10-13 | Dowbrands Inc | METHOD AND APPARATUS FOR CUTTING AND SOLDERING MULTIPLE PLATES OF THERMOPLASTIC MATERIAL HAVING TOUGH SECTIONS |
US5094709A (en) * | 1986-09-26 | 1992-03-10 | General Electric Company | Apparatus for packaging integrated circuit chips employing a polymer film overlay layer |
-
1952
- 1952-08-13 GB GB20341/52A patent/GB740811A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3153608A (en) * | 1961-10-06 | 1964-10-20 | Edwin E Messmer | Machine for heat-treating superposed plies of plastic material |
US3272674A (en) * | 1962-05-28 | 1966-09-13 | Union Carbide Corp | Plastic film welding process and apparatus |
US3334004A (en) * | 1964-02-25 | 1967-08-01 | Union Carbide Corp | Apparatus for cutting and radiant heat sealing thermoplastics |
US5094709A (en) * | 1986-09-26 | 1992-03-10 | General Electric Company | Apparatus for packaging integrated circuit chips employing a polymer film overlay layer |
FR2629755A1 (en) * | 1988-04-11 | 1989-10-13 | Dowbrands Inc | METHOD AND APPARATUS FOR CUTTING AND SOLDERING MULTIPLE PLATES OF THERMOPLASTIC MATERIAL HAVING TOUGH SECTIONS |
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